java接收json数据_Java发送Post请求,参数JSON,接收JSON详解

public static String send(String url, JSONObject jsonObject,String encoding) throws ParseException, IOException{

String body = "";

//创建httpclient对象

CloseableHttpClient client = HttpClients.createDefault();

//创建post方式请求对象

HttpPost httpPost = new HttpPost(url);

//装填参数

StringEntity s = new StringEntity(jsonObject.toString(), "utf-8");

s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,

"application/json"));

//设置参数到请求对象中

httpPost.setEntity(s);

System.out.println("请求地址："+url);

// System.out.println("请求参数："+nvps.toString());

//设置header信息

//指定报文头【Content-type】、【User-Agent】

// httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");

httpPost.setHeader("Content-type", "application/json");

httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");

//执行请求操作，并拿到结果(同步阻塞)

CloseableHttpResponse response = client.execute(httpPost);

//获取结果实体

HttpEntity entity = response.getEntity();

if (entity != null) {

//按指定编码转换结果实体为String类型

body = EntityUtils.toString(entity, encoding);

}

EntityUtils.consume(entity);

//释放链接

response.close();

return body;

}